It sent incorrect bills to about 9,000 of its customers, according to the statement, during the billing cycles ending on November 23rd and 29th.

But the company says customers won't need to jump through hoops to get the money refunded as it's planning to set up automatic credits for over-charged users and it will call or send a letter to everyone with an incorrect bill.

"If you don't receive a phone call or letter from SaskTel, you're not impacted by this error and your bill is correct," the notification says.

This isn't the first time SaskTel has had problems managing its service. Hundreds of customers complained about constant service interruptions last year, according to a report by CTV Regina.

Even the province's premiere, Brad Wall, has pointed out on Twitter that the company drops calls. He later told the media that SaskTel doesn't have the capacity to handle all the calls its customers make, which is probably why it's been upgrading.